JPH01169023A - Fixing structure and fixing method of opening section of manhole - Google Patents

Abstract

PURPOSE:To prevent accidents by exposing a connecting bolt connecting a concrete pipe or a cover receiver to the concrete pipe into a recessed section formed to the inner circumferential wall of the concrete pipe and confirming the fixed state of the connecting bolt. CONSTITUTION:A cover receiving frame 4 is laminated through a first adjust ring 2 made of concrete, a second adjust ring 3 and adjust washers 13, thus constituting an oblique long pipe 1. A hole 6 into which a ring bolt 5 is inserted is bored to the rings 2, 3 and a recessed section 7 to the inner circumferential surface of the ring 2 respectively. A receiving-frame fixing bolt 12 is inserted into a bolthole 10 for the frame 4, and engaged with the upper end of the bolt 5 previously inserted into the rings 2, 3, and a cover bolt 15 is screwed to the lower end of the bolt 5 and exposed to the recessed section 7 and fixed by a lock washer 16 and a nut 17. Pavement such as asphalt in the periphery of the frame 4 is executed, and the fixed state of a device is confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a manhole opening fixing structure and fixing method for attaching and fixing concrete pipes to each other or a lid receiving frame to a concrete pipe of a manhole.

<Prior art> A conventional fixing structure or fixing method of this type of manhole opening is, for example, the Japanese Patent Publication No. 60-5 developed by the applicant of this patent.
As shown in Publication No. 3139, a lid receiving frame having locking protrusions for preventing rotation along the bolt holes is placed on the concrete pipe of the manhole, and anti-rotation washers etc. are sequentially stacked above and below this lid receiving frame. Oval bolts were inserted into the bolt holes of the manholes to attach and secure the cover holder frame to the concrete pipe of the manhole.

<Problems to be Solved by the Invention> However, the conventional manhole opening fixing structure and fixing method described above has the function of fixing bolts, nuts, etc. on the upper surface side of the lid receiving frame. Therefore, after construction, paving such as asphalt is immediately applied on top of the fixed structure to cover it up, so that there is a problem in that the construction state of the fixed structure, that is, the fixed state cannot be checked afterwards.

Therefore, if you leave the bolts unattended without checking the fixing condition, the bolts may become damaged due to vibrations caused by passing vehicles, etc.
There was a risk that nuts, etc. would become loose and the lid holder frame would fall off due to external pressure, causing a major accident.

The present invention relates to a completely new technique developed in view of these conventional problems.

Means for Solving the Problems> The present invention provides a structure in which concrete pipes for manholes are attached and fixed to each other or a cover frame is attached and fixed to the concrete pipes.
A recess is provided in the inner peripheral wall of the concrete pipe, one end of a fastening bolt for fastening the one concrete pipe or the lid holder frame to the concrete pipe is exposed in the recess, and a nut is screwed into the exposed fastening bolt. The present invention relates to a manhole opening fixing structure and fixing method for attaching and fixing concrete pipes to each other or a lid receiving frame to a concrete pipe.

<Function> As described above, in the fixing structure and fixing method according to the present invention, a deep recess is provided in the inner circumferential wall of the concrete pipe, and a lid receiving frame or other concrete pipe is fastened to the concrete pipe of the manhole. The lower end of the fastening bolt is exposed in the recess, and the nut is screwed into the exposed fastening bolt to attach and fix the lid holder frame to the concrete pipe, so there is no need to place asphalt, etc. on the lid holder frame after construction. Even after paving has been carried out, it is possible to check the fixation status of the lid receiving frame or concrete pipe and other concrete pipes, and if bolts, nuts, etc. are loose, they can be tightened within the recesses. .

<Example> An example of the fixing structure and fixing method according to the present invention will be specifically described with reference to the drawings.
In E), 1 is a diagonal wall pipe of an assembled manhole constructed by sequentially stacking concrete pipes, and a first adjustment ring made of concrete that can adjust the height is installed on the upper surface of the pipe. A second adjustment ring 3 and a lid receiving frame 4 to which a manhole cover (not shown) can be attached and fixed are stacked in this order.

A vertical hole 6 into which the ring bolt 5 can be inserted is formed in each of the two adjustment rings, and a deep recess 7 that communicates with the vertical hole 6 is formed in the inner peripheral surface of the tm1M adjustment ring 2. Also, a stainless steel frame 8 is provided on the inner peripheral surface of this recess 7. Ring bolt 5 inserted into the vertical hole 6 above
are interconnected by connecting nuts.

Along the bolt hole 10 of the lid receiving frame 4 is a rotation prevention protrusion 1.
A receiving frame fixing bolt 12 having a rectangular head is inserted into the bolt hole 10, and this bolt 12 is screwed into the ring bolt 5. 13 is an adjustment washer interposed between the second adjustment ring 3 and the lid receiving frame 4; 14 is mortar; and 15 is a lid screwed onto the lower end of the ring bolt 5 and exposed in the recess 7C. A lock washer 16 and a nut 17 are attached to the exposed end of the bolt.

In the above embodiment, the head is a rectangular receiving frame fixed pole) 12
The receiving frame fixing bolt 12 was constructed so as to engage with the anti-rotation protrusion 11 of the lid receiving frame 4, but the receiving frame fixing bolt 12 was fixed as shown in FIGS. 5(A) and 5(B). It is also possible to prevent rotation by forming the head into an ellipse and fitting the head into the elliptical bolt hole 10 of the lid receiving frame 4.

In assembling the fixing structure according to the present invention, the holder frame fixing bolt 12 is inserted into the bolt hole 10 of the lid holder frame 4, and the bolt 12 is locked to the rotation prevention protrusion 11 so as not to rotate. Screwing the hole eye 2 onto the upper end of the ring bolt 5 inserted in advance into the adjustment ring 2° 3, then screwing the lid bolt 15 onto the lower end of the ring bolt 5 and exposing it in the recess 7, Furthermore, lock washer 1 on lid bolt 5
6 and a nut 17 are attached and tightened with the nut 17, the whole can be fastened and fixed.

Further, the rotation of the cross-section 7 can be stopped by a Ronwarashia 16.

In the above embodiment, the recess 7 is provided in the 111th adjustment ring 2, but by providing the recess 7 in the inclined wall tube 1 located below the adjustment ring 2, the lid receiving frame 4 can be tilted. It is also possible to fix it in the wall tube l. However, adjustment ring 2
Since it can be used commonly for large and small manholes, it is more convenient than providing the recesses 7 in the inclined wall pipes 1 of different sizes.

Further, in the above embodiment, the lid holder frame 4 is attached to the adjustment ring 2.
3 has been described, the invention can also be used when attaching adjustment rings 2.3 to inclined wall pipes 1, ie when interconnecting concrete pipes.

Further, in the above embodiment, the recess 7 can be completely buried with concrete or the like after the construction is completed and the fixing is confirmed.

<Effects of the Invention> Since the manhole opening fixing structure and fixing method according to the present invention have the structure and operation as described above, it is possible to construct the entire fixing device and pave with asphalt or the like around the lid receiving frame. You can check the fixation status of the entire fixing device after completely concealing the opening of the manhole.Furthermore, if bolts, nuts, etc. are loose, you can easily tighten them by placing them in the recess. Therefore, it has the feature of being able to reliably prevent accidents such as the lid receiving frame falling off due to vibrations when a vehicle or the like passes by.

[Brief explanation of the drawing]

Fig. 1 is an explanatory cross-sectional view showing the fixing structure and fixing method according to the present invention, Fig. 2 is a cross-sectional view of the main part thereof, Fig. 3 is a cross-sectional view taken along A-=A in Fig. 1, and Fig. 4 (A) to (E) are explanatory diagrams of parts, and FIGS. 5(A) and (B) are explanatory diagrams of parts on the other side. 1 is an inclined wall tube, 2 and 3 are adjustment rings, 4 is a lid holder frame, 5 is a ring bolt, 7 is a recess, 9 and 17 are nuts, 11 is a rotation prevention projection, 12 is a holder frame fixing bolt, and 15 is a lid bolt It is. Applicant Haneda Huyum Kan Co., Ltd. Agent Patent Attorney Shukichi Nakagawa Figure 4 (A) (D) (A) (E) (B)

Claims (2)

[Claims] (1) In a structure in which concrete pipes for manholes are attached and fixed to each other or a lid holder frame is attached and fixed to the concrete pipe, a recess is provided in the inner peripheral wall of the concrete pipe and one of the concrete pipes or the lid holder frame is fastened to the concrete pipe. A manhole opening characterized in that one end of a fastening bolt is exposed in the recess, and a nut is screwed onto the exposed fastening bolt to attach and fix the concrete pipes to each other or the lid receiving frame to the concrete pipe. Fixed structure. (2) In the fixing method of attaching and fixing concrete pipes for manholes to each other or a cover frame to a concrete pipe, a recess is bored in the inner peripheral wall of the concrete pipe such as an adjustment ring or a diagonal wall pipe, and one of the concrete pipes is fixed. A concrete pipe or a lid holder frame is laminated on a concrete pipe having a recess, one end of a fastening bolt that can be connected to each other is exposed in the recess, and a nut is further screwed onto the exposed fastening bolt. A method for fixing a manhole opening characterized by attaching and fixing concrete pipes to each other or a lid receiving frame to a concrete pipe.